The graphic below shows the most current tracks for Ocean Shield in Yellow, while those of HMS Echo are in White. The earliest TPL towing tracks for Ocean Shield are Red. The stars shown represent the approximate positions of received pings, as the data provided by AMSA wasn't specific.
NOTE: The positions are obtained via a sun synchronous satellite which is in sight of the vessels for 3 or 4 south going passes and the same for north going passes each day.